package com.it;

public class demo1 {
    public static void main(String[] args) {
        int a = 11;
        byte b = (byte) a;
        for (int i = 0; i < 10; i++) {
            a--;
        }
        lo:while (true){
            switch (a){
                case 1:
                    System.out.println("Hello world!");
                    break lo;
                case 2:
                    System.out.println("Hello world!");
                case 3:
                    System.out.println("Hello world!");
                    break lo;
                default:
                    System.out.println("Hello world11!");
                    break lo;
            }
        }
        System.out.println("Hello world!");
    }
}
